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  1. CLR Heater Core Flush - Success Rate? Failure Rate?

    Nov 14, 2013 · the OEM core that I changed out for an aftermarket one was so clogged it wasn't funny. I did it with the help of a buddy at his house (vwb5t's), and on the way home, the heat blew me out of …

  2. Heater Core - Replace or Flush | Volkswagen Passat Forum

    Mar 18, 2022 · My 05 Passat has 117k miles and has been maintained pretty well. I am getting very little heat during the winter so I know the heater core is clogged. Given it's age, I know the process of …

  3. DIY: BLEEDING COOLING SYSTEM and HEATER CORE FLUSH

    Aug 5, 2024 · If the bleeding process is carried out correctly, there will be no air left in the system. HEATER CORE FLUSH Always reverse flush, connect the feed hose to the outlet (the one with the …

  4. No heat. Flushing the heater core. - Volkswagen Passat Forum

    Oct 11, 2023 · The previous owners/mechanic of this 2005 V6 mixed pink and green anti-freeze and the whole system gummed up. It was only an intuition that I bypassed the heater core when using the …

  5. Heater core clogged - Volkswagen Passat Forum

    Nov 23, 2009 · Heater core clogged clogged core heater Jump to Latest 34K views 15 replies 10 participants last post by ctime Dec 9, 2009

  6. Homemade Heater core flushing tool - Volkswagen Passat Forum

    Apr 29, 2017 · Hook up the heater hose sections to the heater core inlet and outlet for the usual garden hose flush. I drilled a very small hole into the inlet hose - through a patch of duct tape so I could …

  7. CLR meets heater core- finally did it - Volkswagen Passat Forum

    Sep 14, 2009 · After seasons of doing water flushes with less than marginal success, I finally got the guts up to try CLR. I figured it would either fix it, do nothing, or destroy the core. Anything is a good …

  8. heater core flush success | Volkswagen Passat Forum

    Nov 19, 2016 · Much easier than replacing the heater core. I hope you used proper VW coolant 50/50 with distilled water for the new fill ?

  9. New "Fast and Simple" Heater Core DIY | Volkswagen Passat Forum

    Aug 14, 2015 · New "Fast and Simple" Heater Core DIY core diy fast and simple heater new Jump to Latest 24K views 63 replies 23 participants last post by bill1975 Nov 27, 2015

  10. Successful unclog of heater core | Volkswagen Passat Forum

    Aug 29, 2019 · I also read of success just using water, or water and air, and that seemed good to try first. I bought a coolant flush gun OTC 6043 which allows sending bursts of air and water into the …